Children wave to marching coal miners in Petrosani, Romania, Thursday, March 8, 2012. Several thousands coal miners have marched in western Romania, refusing to go down the mines for the fourth day in row to protest over low salaries and work conditions, they were threatening to continue to Bucharest, but were stopped by riot police who blocked a bridge out of the city. The state-owned coal mining company in Petrosani has seven mines and employs 7,800 people. Romania is expected to lay off 3,300 mining employees by 2018, as part of an agreement with the International Monetary Fund. (AP Photo/Vadim Ghirda)